Sifter for ashes



NITED STATES PATENT OFFICEe J. HERBERT CHASE, OF CAMBRIDGE,MASSACHUSETTS.

SIFTER FOR ASHES, 80C.

SPECIFICATION forming part of Letters Patent No. 227,487, dated May 11,1880.

' Application fnea February 19, issn.

To all whom it may concern Be it known that I, J. HERBERT` CHASE, ofCambridge, Middlesex county, and State of Massachusetts, have invented acertain new and useful Sitter for Ashes, Ste., of which the following isa specification.

This improved sifter in substance consists of two end or head piecesjoined together by two sieves, leach of which is of a semicircular shapein cross-section, and both are arranged in relation to each other and toa common central line or axis of the two heads for the edges of the onesieve to pass by the edges of the other sieve, leaving a space oropening between each of such overlaps, and with the center of eachsemicircular sieve eccentric to the central axis of the heads, whichaxis is the longitudinal axis of the cylinder, as it were, made bythesaid two heads and the said two arc-shaped sieves, arranged asaforesaid, and about which axis tl e said cylindrical sieve revolves,traveling through a vertical plane.

It also consists in the combination, with the above, of a ilat sievearranged in an inclined position below the said cylindrical sieve, andwhich in such arrangement, if desired, is adapted to be removed andinserted at pleasure, all substantially as hereinafter described.

In the accompanying plate of drawings my improved sifter is illustrated,Figures l and 2 being central transverse vertical sections of the same,showing the cylindrical sieve in the one position for receiving thematerial to be sifted'by it and in the other position for dischargingthe material remaining in the sieve after the sifting operation has beencarried on to the extent desired; Fig. 3, a plan view of the cylindricalsieve with the box or casingin horizontal section; Fig. 4, an elevationof one end of the casing or box, and Fig. 5 a sectional view :in detail.

' In the drawings, A represents the cylindrical sieve. This sieve iscomposed of two head or end pieces, B B, joined together by two sieves,C C, each of a similar semicircular shape in cross-section. These sievesare secured to the head-pieces, and each sieve` has its center at oneside of the central line of the longitudinal shaft D, but ,on oppositesides thereof. The shafty D joins the two headpieces, and the edges a.of the one sieve pass by and overlap the edges b of the other sieve,leaving a space or opening, d, between such overlapping portions in eachinstance.

The central shaft, D, passes through the head-pieces B B, and by suchprojectingparts the cylindrical sieveA is suspended in a horizontalposition in bearings of a box, E, incasing the said cylindrical sieveand other parts making up this improved sifter, as will hereinafterappear.

F is a crank-handle on one end of the shaft D, for convenience inturning it and parts attached to it, as aforesaid.

Gr is alat wire-screen having meshes or openings f', and attached to aframe, g, which is secured within the casin g or box below thecylindrical sieve A, and so as to incline from one side under this sieveG is a chamber, J, for receiving whatever passes through its meshes.

K is an opening in top of box, and L a lid for closing the same, whichopening is on the opposite side of the box tothat having the spout H.

The use of the above-described sifter is as follows: First, bring eitherone of the openings between the overlapping edges of the two sieves tothe opening at top of box, and, holding the cylindrical sieve there,then pour into such open end the material to be sifted, and when this isdone rotate the sitter in the direction of the arrow M. (Shown in Fig.l.) As this rotation proceeds, obviously the material placed in thesifter passes and rolls down and over the sieve C as it passes upward,sifting the same as it passes along, when, reaching the edge bof suchsieve C, it falls over the same upon theother sieve C, and over it itrolls until it reaches its edge b, when it falls from such sieve uponthe sieve it was first put upon, and so on as long as such rotation ofthe sifter is continued. By this means the material is sifted-that is,it is relieved of such portions as can pass through the meshes of thesieve-and in such sifting operation the material being sifted is givenlfrom time to timeas, for instance, once in every half-revolution of thesifter--a tumble or fall from one sieve IOO to the other, whichobviously is advantageous, as it secures a most eii'ective agitation oi'the material while undergoing` the sifting operation.

Having thus accomplished the sifting of the material placed in the sieveA, as aforesaid, to discharge the material then remaining in it, trstbring the sieve to the position at which the sifting operation wasbegun, and then rotate the sieve in the opposite direction until theuppermost edge of the seinicircular sieve, then in the lowest position,reaches the side ot' the box having the discharge-spout, when, as isobvious, the material on such sieve neces sa rilyescapes and falls uponthe inclined sieve, passes over that, and escapes at thc spout.

N is a spring-stop secured to outside ot' casing E in position io make astop for the crankA handle F ot" the sifter when the siiter isy to becharged with the material, as aforesaid. This stop yields to the swingof the crank in the one direction to sift the material within thecylindrical sii'ter, as aforesaid, and thus does not interfere with suchmovement ot' the sifter, while in the movement of the sifter in'the0pposite direction, to discharge it, it can be readily placed out ot'position ot'interierence with such movement ot the sifter.

The lower and inclined sieve obviously increases the eiciency of thesifting operation, and in lieu ot' being arranged in an inclinedposition it may be in a horizontal position; but it is preferable tohave it inclined, as it then secures an automatic delivery, asdescribed, ot' all that falls upon it and does not pass through it. Thisinclined sitter, as shown in Fig. 2, is arranged so as to be slid in andout oi' guides or ways in the sides of the box or casing, and thus, ifdesired, a plain board may be inserted in place of it, or the spacecovered and embraced by it when it is Within the box may be left open,if so desired, by simply drawing it out, and also this sifter caninelineto either side, as desired, and in such case the spout H can becorrespondingly changed.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A cylindrical sii'ter horizontallyhung in suitable supports andcomposed of two sieves, arc-shaped in cross-section, which are arrangedeccentrically to the longitudinal axis of the sifter, and so as tooverlap by their edges, with spaces or openings between them, allsubstantially as described, and for the purposespecitied.

The combination, with a cylindrical sifter horizontally hung in suitablesupports and composed ot' two sieves, arc-shaped in crosssection, whichare arranged eccentrically to the longitudinal axis of the sifter, andso as to overlap by their edges, withI spaces or open ings between them,of an inclined sieve, which is placed below such cylindrical sitter andotherwise arranged in relation thereto, all substantiall y as and torthe purposes specified.

3. rlhe cylindrical sifter having two arcshaped sieves, C G, and aninclined sieve, G, in combination with a suitable box or casing, E, allsubstantially as herein described, for the purposes specified.

J. vHERBERT CHASE.

